Colic, extened but unexplained crying in a new born infant, effects around 20% of western babies. Whilst apparently harmless it does cause a get deal distress to parents and the baby. Despite its prevalence, Doctors do not know what causes it though many explanations have been suggested.
There have been some suggestion that colic babies tend to develop educational problems in later life though there is no direct evidence for this. However an article in the New Yorker may add some weight to this. Professor Barry Lester has been studying colic for most of his professional career suggest that some colicky babies are “hypersensitive to normal stimuli” and over-react to normal stimulus. He has also studied 3 – 8 year-olds who had colic as a child and found the 75% “suffered from behavioral problems, including a limited attention span, tantrums, and irritation after being touched or coming in contact with particular fabrics or tags in their clothing”. Lester speculates that “Colic threatens to cause problems in the child’s ability to form relationships, because the child doesn’t learn behavioral regulation and develops problems with impulse control,”.